US1141704A

US1141704A - Easel.

Info

Publication number: US1141704A
Application number: US80181113A
Authority: US
Inventors: Walter H Carson
Original assignee: ELSAMUR S FRENCH
Current assignee: ELSAMUR S FRENCH
Priority date: 1913-11-19
Filing date: 1913-11-19
Publication date: 1915-06-01
Anticipated expiration: 1932-06-01

Description

' E. s. FRENCH & w. H. CARSON.

EASEL. APPLICATIN FILED NOV. I9, 1913.v

.Patented June l, 1915.

2 SHEETS-SHEET l.

WITNEssEs: v

E. S. FRENCH & W. H. CARSON. EASEL.

1 APPLICATION FILED NOV. I9. |913. 1,141,704. 111161116111111@ 1, 1915.

2 SHEETS-SHEET 2.

///%V//////// J 0 y gil-WA l j E A ZB v ATTORNEY UNITED STATES PATENT oEEIcE.

ELSAMUR S. FRENCH .AND

, i 'rl l"WALT-:ERI H. CARSON, OF DENVER, COLORADO; CARSON ASSIGNQR TG SAIIY FRENCH.

EASEL.

' T0 all whom/Muay concern.'

Beit knownthat we, ELsAMon S. FRENCH and WALTER H. CARSON, citizens of the United States, residingat Denver, inthe county of Denvdr and State of Colorado, have invented certain new and useful lmprovements in Easels, of which the follow ing is a specification, reference being had therein to the accompanying drawing.

This invention relates to certain new and useful improvements in easels and more particularly to that class of easel employed in enlarging, reducing, copying or 'lanternslide Work, when used in connection with artificial or daylight by photographers for dark room or finishing work; the object beingto provide an easel which is exceedingly.

simple and cheap in construction and one which is mounted upon a carriage in order to enable the same to be quickly adjusted into the desired position for rthe purpose of obtaining the desired sized image in enlarging or reducing a photograph or the like. Z

vide an easel with an adjustable mask which can be quickly adjusted to form any sized rectangle in order to obtain any portion/ of a negative required, which enables the photographer to make prints with square, clear-cut white borders of any size, or fancy or shaded borders, thereby overcoming the disadvantages now' existing with easels of this character now in use.

Anotherand` lfurther object of the invention is to provide an easel which is cornposed of three frames; -one frame being rigidly mounted upon a movable support or carriage; the other two frames being ar' ranged within one another 'and vconnected v to the rst frame by spring-hinges in order ist to' allow the frames to be swung apart to enable the sensitive paper. or plate to Ibe quickly inserted between the gla'ss carried by the respective frames,`when the 4frames are in lowered position.

Another object of the invention is to provide one of the frames with a ground glass in order to enable thephotographer to focus the image thereon before inserting the sensitive paper or plate between the plate glass and ground 'glass carried by the respective frames.

Another and further object of the inven` tion is to provide an easel Which is carried fspecicatoh of Letters .'Pa'tent.

Another object of the invention is to pro? Another and still further object of the invention is tov provide a Zmask composed of marginal strips mounted upon threaded rods capable of moving in pairs toward and .Patented June 1, 1915.

I Application filed November 19, 1913. Serial No. 801,811.

soK

away from each other by the voperation ofV thumb knobs 'so as to adjust the 'sizeof the Y rectangle within the strips in order to obtain the portion of the negative desired lor to form a clear-cut white, or shaded border l on the print. Y

Other and vfurther objects and advantages of the invention-'will hereinafter set forth and the novel features thereof defined by the appended claims. l v.

` In the drawings-Figure 1, is a perspective of our improved construction of easel showing the application of the same vFig. 2, is an elevation partly-in section;.Fig. 3, is a jside elevation with the movable frames swungv apart; Fig. 4f, is adetail enlarged vertical section through the easel; F ig. 5, is a detail section showing the arrangement ofthe threaded rods and operating gears for adjusting' the mask strips; F ig. 6, is a detail t`op plan of the focusing means for obtaining the fine adjustment of the movable support; and F ig. "Z, is a vertical section through a slightly modified form of easel.

Like numerals of reference refer to like parts in the several igures of the drawings.

In the dra-wings, l indicates an enlarging or copying camera having the usual lens 2 and provided with a light Kopening at its rear end in which isadapted to be placed, a light such as a carbonarcor mercury arc for projecting the negative arranged within the camera through the lens upon the paper carried. by the easel, which will be later described.y The above description is given so that the operation of the easel used in con- 1 nection with an enlarging camera, can be readily understood and while we have shown /a camera. employing artificial light, it is of course understood that daylight can be em* ployed in order to accomplish the same result.A The light-tightbox of the, enlarging camera is preferably ,formedof'suiiicient size to allow the insertion of artificial li ghtS 3 at its forward end in such a position that the rays therefrom will be projected upon the image arranged upon a suitable supportlarging camera can be employed,` or a camera constructed especially for copying work can be employed.

When the easel is used in connection with,

an enlarging camera, the negative is mounted therein in the ordinary manner and projected through the lens ofthe camera by a light a, eitherdaylight or artificial, onto the paper carried by the easel. When used in connection with copying work, an image is placed within the boa of the camera, but'it is of course understood that the light opening at the rear end has been closed and the lights 8 turned on and the image will be projected through the enlarging -camera onto a sensitive plate or paper arranged within the easelin order to enlarge or reduce the same as the case may be, and while we have illus'- trated acamera of this particular construc- 4 engagement with the rack so as to move the tion, we wish it'to be clearly undersood that our construction of easel canbe used in connection with any construction of camera and for any purposedesired, without departing from the spirit of our invention; the above descriptions being( given'so that theoperation of our improved construction of camera, as willvbe hereinafter fully described, will be clearly understood when used for" enlarging orcopying work.

Extending forwardly from the front of vthe camera,` are parallel rails 5,' 6 and 7

side rails

5 and 7 are grooved longitudinally and the central rail 6 is provided with a'- longitudinally extending 'iT-shaped-groove in cross section, as clearly shown in lig. 2, for the purpose hereinafter fully described.

, Mounted upon the rails 5, G and 7 is a carriage 8 comprising a base 9 provided with depending guide members 10 fittingsnugly withinthe grooves of theoutside rails inorder to hold the carriage in proper'position thereon as the same is moved backward and forward upon the track or in respect tothe enlarging camera, when used in connection therewith.

'llldfbase 9 of thecarriage carries a headedA niaif/oa bolt 11; the head of which is arranged within adjusted position in respect to the enlarg- '.lhe rail 7 is preferably provided with a rack 13 along one side adapted to be engaged ing camera..

by a mutilated gear 14: formed on the end of y a lever 15 which is pivotally mounted on a depending bracket 16 carried by the carriage 8 in orderyto move the carriage in either direction so as Ato obtain a iine adjustment in focusing the easel, and it will be seen that when the mutilated gear is in the position shown in Fig. 6, thecarriage is free to move upon the track in either direction it of course being understood that the knob nut 12 has been previously loosenedand after the initialadjustmert has been made, the knob nut 12 is tightened sufficiently to hold the carriage from being moved accidentally upon the track.

1 When it is desired to obtain a slight adjustment of the carriage in either direction in focusing the easel, by operating the lever l5, the mutilated gear will be thrown into carriage slightly upon the rails in the desired direction.

rlhe base of the carriage 8 is provided with end supports 17 between `which is mounted, a rectangular wooden frame 18 which is held rmly in. a vertical position therein by any suitable means, and while we have shown and described the frame 18 as being reinforced, upon its edges by metal strips," itis' of course understood that any sui-table'construction of frame can be employed and that the configuration can be changed, but for ordinary purposes, areotangular frame is employed. We dol not wish to limit ourselves, however, to the .use of any particular material in constructing this frame, or to any configuration, as in some instances it might-be found preferable to construct the same of metal and in another instance of .wood or the shape of the frame might be' changed.

rllhe frame 18 is secured firmly perpendicularly between the supports v17 of the carriage in order to form a rigid support for the supplemental frames, as will be later described. Mounted within the frame 18 is a frame 2'() formed of any suitable material which ts snugly .therein and is supported by a pair of compound spring hinges '21 at its lower edge and is held within the ily operated by' the photographer in order` tion.

i with the' keeper. Thli's frame is also rectanguiar' in shape and is provided with a thin plate glass 24 upon which the plate or paper is adapted to be placed, as will be hereinafter fully described.'

The side and end bars constituting' the `frame are provided with longitudinal pockets' 25 having longitudinal slits in their inner faces adjacent the plate glass as clearly shown in Fig. 4. Arranged within these pockets', are threaded

rods

26,27, 28 and 29 having op'posi'tely threaded end portions;

.said rods bein-g mounted in bearings v30, one 'being arrarrged` at each end and at the middie of each rod and the rods are preferably grooved to 'receive the bearings in order to prevent the .same from moving longitudinally Within the pockets 25 as they are rotated.

The t'Wo horizontally threaded rods fare provided with beveled gears 31 at one end, which mesh ivith beveled gears 32 carried by a shaft 33 on Which is fixed a beveled. gear 34 meshing With a beveled gear 35 c'arriedby a knob shaft 36 extending at right` angles to the horizontal rod.y The knob of this shaft 36, is arranged beyond the bar 'of the frame at the lower corner thereof in.

suc'h-a position that the saine can be readto rotate the threaded rods. either direc- The vertically threaded rods 26 :and 28 are c provided Withbeveled gears37 at their upper endswhichlnesh with beveled gears 38 carried by an operating rod 39 arranged -in the top horizontal bar ofthe frame; said rod carrying ak beveled gear 40'meshingwith a beveled gear 4l carried by ay knob shaft 42 arrange-d at right angles theknob of which, is arranged in such a position that the same can be readily lturned by'the photographer, and as shown in the/drawings, these knobs are prefer'ablyarranged in vertical position, one-above the other upon the same side of the frame, but it is of course .understood that. the position ofv these operating knobk shafts lis vimmaterial,as the maimfu'nctionthereof, ijs' to! provide means for facilitating the .rotation 0f the threadd'rods.

Mounted on the ends of the

rods

26, 27,

v28 and 29er. to each of their longitudinal middles, are' nut portions 43 of mask strips 44, the horizontal'mask strips overlapping the yertical mask "strips in such a manner that by operating the knob shafts 36 and 42,

ythe "pair of vertical and' horizontal maskl strips can' be moved toward and-away from each other to forma rectangular opening of the desired size, vso as to eirpose' the portion of the negative desired or to form-the print A frame;

with a@ lessee width margin. These Strips `are preferably formed of thin sheet metal The conrpourdhiges 21 which are .carried by the fixed frame 18 are provided with overlapping leaves 21', 212; the leaves 2l being connected to the frame 20 at its lower edge and the leaves 212 are connected to the loyver edge of a frame which fits- 'snugly Within the frame 20 and this frame is provided with a plate of ground glass 46 adapted to; clamp the plate or paper in posi-tion against the plate glass 24 over the mask strips 44, the springs yielding sufficiently to accommodate the difference in thickness be'- tvveen a plate of glass and aV sheet of paper and the' springs normally have the tendency -tohold the frame 45 Within the frame 20 and it will be seen that by rel-easin' the spring catch 2'2, the frame 20 with the rame -frame 2O by a spring catch 47 cooperating with a keeper 48 carried by the frame 20 in lee orderto hold the tvvo frames `in close relation with each other. By this construction the freine 20 is free tomove in respect to the fra-me'18 and the frame 45 is free to move in respect to the frame 20 or the framel 20 with the frame 45 can be moved together.

Upon the ground glass 46, a central vertical line is marked which is intercepted by a horizontal centrally arranged line; these io'S lines' being' graduated in order to form a scale and they may be/formed upon the ground glass by etching or by permanently affix'infg thereto, a thin strip of any suitable material. Thisenables the correct placing is employed for clamping vthe plate or paper against -the plate glass of the frame 2Q .by means of the spring members 51 and while we have shown this form, it isfof course understood that various other changes in cong, mamon struction can be made without departing mounted in respect to the other frame, glass from the spirit of our invention. plates carried by said movable frames having From the foregoing description, it willbe a contacting faces, means for v.locking said K seen that we have provided an easel which frames within one another, one of said glass is constructed of a series of` framesone arplates being 'a focusing glass, and mask ranged within the other, one of the frames strips carried by one of said frames having being provided with a' plate glass and the `means for moving said strips in respect tov other with a ground glass held in contact by each other. spring hinges in order to hold the-paper or `8. An easel, comprising a series of vertiplate between the glasses. lt will also be cally .disposed nesting frames, one of Isaid seen that we have provided `a masking de` frames being provided with a plain glass vice in connection with one of the frames and the other with a focusing glass, andA composed of a series of right-angled armeans for holding said glass plates 1n conranged strips mounted upon threaded'rods tact with one another. which are operated Vby knobs carried by shafts having driving connections with the frames, one of said frames being provided threadedrods for moving the strips toward with av plate glass and-the other with a and away from each other. focusing glass having positioning lines l/Ve claim: marked thereon, and means for holding said 1. An easel, comprising a frame having a glass plates in contact .with one another. plate glass. arranged therein, and a second 10. An easel, comprisinga series of nest-4 frame movably mounted in respect to the ing frames, two of said frames being prQy first frame', having a ground glass arranged vided with plates of glass contacting with.Y therein adapted to contact withthe plate one another one of said glass plates being glass. a focusing glass, one of said framesbeing Q. An easel, comprising a series oli-nesting provided with horizontally and vertically frames, two of said frames being provided arranged mask strips, and means for operwith contacting glass plates, and a carriage ating said mask strips. for supporting said frames, one of said 1l. An easel, comprising a series of nestplates being a focusing glass. ing frames, one of said frames being pro- 3. An easel, comprising a frame having vided with a plate glass, andanother of pockets formed in the side bars thereof, .said frames being provided with a ground threaded rods mounted in said pockets, glass plate contacting with the plain glass mask strips connecting said rods and proplate, and mask strips carried by the frame vided with nuts mounted upon said rods, with the plate glass and contacting with the and means for rotating said threaded rods inner face thereof, said mask stripsvbeing to move said mask strips toward and away arranged in pairs, and means for independfrom each other. l ently moving each `pair of mask strips in 4C. An easel, comprising a frame having unison. pockets formed in `the side bars provided l2. An easel, comprising 'a frame-having with longitudinal slits, rods mountedin said a plate glass arranged therein, theside and pockets provided with oppositely threaded end bars of said frame being provided with ends, mask strips provided with nuts mountlongitudinally arranged pockets having slits ed upon said rods, and means for 'rotating communicating therewith in. their inner said rods foradjusting said mask strips in edges, rods revolubly mounted in said respect t0 0I1e another pockets having. oppositely threaded ends,

9. An easel, comprising a series of nesting vim 5. A photographicA easel, comprising a mask strips contacting with rthe inner face A movablecarriage, a frame fixed to said carof said plate glass having nuts at their ends riage, a second frame nesting in the fixed mounted upon said threaded rods, and means frame having a plate glass secured therein, for rotating said r`ods for adjusting said and a third frame nesting within the second mask strips in respectv to each other. frame having a ground glass arranged thereL in coacting with the platejglass.

6. An easel, comprising a vertically. arsaid carriage, a plate` glass arranged within ranged Xed frame, a pair of nesting frames said frame. said frame being. provided with carried 'by said fixed frame and adapted to longitudinal pockets in its side members, lfit within the same, said nesting frames behaving longitudinal slots communicating ing capable of moving in respect to each with the inner edges thereof, oppositely. other, means for'loclnng said frames one threaded rods mounted to rotate in saidwithin the other, and glass plates arrangedfpockets, metal `-strips having nuts at their .within said nesting frames having contactends mounted upon the respective ends of ing faces, one of said glass plates being a said threaded rods, and knob ,shafts having focusing plate. r driving connections with said threaded rods 7. An easel, comprising a series of nesting for moving said strips in pairs toward and frames, two of said frames being movably away from each other.

13. In an easel, the combinationwith aA movable carriage, of a frame mounted upon- 1i. An easel, comprising a frame provided with a plate glass and having ongitudinal pockets formed in' its side and end members, said pockets Communicating with longitudinal slits formed in the inner edges of said side and end members, oppositely threaded rods revolubly mounted in said pockets, mask strips provided with nuns mounted upon said rods, gears carried by said rods, driven shafts provided with mesh ing gears, and knob shafts having driving connections with said driven shafts for revolving said rods for moving said mask strips in pairs toward and away from each other.

In testimony whereof we afIiX our signatures in presence of two witnesses.

ELSAMUR S. FRENCH. WALTER H. CARSON.

l Witnesses:

W. A. HART, L. M. PRATT.